The USS Daniel Boone (SSBN-629) was a James Madison-class ballistic missile submarine constructed for the United States Navy. She was the only vessel to bear the name of the frontiersman Daniel Boone. The contract for her construction was awarded to Mare Island Naval Shipyard in California on July 21, 1961. Her keel was laid on February 6, 1962, and she was launched on June 22, 1963, with Mrs. Margaret Smith Wakelin serving as her sponsor. The submarine was officially commissioned on April 23, 1964, with Commander George P. Steele, III, commanding her Blue Crew, and Lieutenant Commander Alan B. Crabtree leading her Gold Crew. Designed as a ballistic missile submarine, USS Daniel Boone was initially equipped with Poseidon C-3 missiles, along with the associated Mark 88 fire control system. During her first major overhaul, she was retrofitted with the newer Trident C-4 missiles, becoming the first James Madison-class submarine to operate with this advanced armament on September 6, 1980. She was assigned to Submarine Squadron 15 and became the first ballistic missile submarine in the Pacific Fleet. In late 1985 or early 1986, USS Daniel Boone underwent a refit at Tenneco Shipyard in Newport News, Virginia. During sea trials on April 7, 1987, she ran aground in the James River. The incident occurred when the Officer of the Deck attempted to counter tidal currents by lowering the Secondary Propulsion Motor (SPM), which was then snapped off on a sandbar. An attempt to retract the SPM could have caused a hull breach, but watchstanders prevented this retraction, averting sinking. The grounding caused significant delays due to hull repairs and the need to replace the SPM, although no ballistic missiles were aboard at the time. USS Daniel Boone was decommissioned on February 18, 1994, and was stricken from the Naval Vessel Register the same day. Her scrapping was completed later that year through the Nuclear-Powered Ship and Submarine Recycling Program in Bremerton, Washington, by November 4, 1994. Her service marked a significant chapter in Cold War naval history, particularly as part of the strategic deterrent force during her operational years.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.